Changing the Locally Administered Address

There might be times when you want to change or override the network address of the network adapter card when running the DLC protocol. You might want to do this, for example, when communicating directly to a mainframe. Certain configurations of mainframe software require the network address of the devices connecting to it to follow a set format, so it might be necessary to change the card's network address. You can do this through the Registry Editor.

Note

The following example is for an IBM Token Ring adapter. This parameter is supported on other network adapters as well, but not necessarily all.

The following instructions do not apply when connecting to a mainframe via SNA Server. The modifications needed to the network address are handled during the installation process.

To change the address of an adapter card

  1. From the File menu of Program Manager, choose the Run command.
  2. In the Command Line box of the Run dialog box, type REGEDT32.EXE, and then choose the OK button.
  3. When the Registry Editor starts, select the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ibmTOKMC01

  1. From the Edit menu, choose Add Value. For Value, type NetworkAddress, and select REG_SZ for data. Choose OK.
  2. Type the 12-digit Locally Administered Address (LAA) that you need to communicate to the mainframe. If you don't know this address, see your network administrator or operations group.
  3. Exit the Registry Editor and restart your computer.

(You must restart the computer for the modification to take effect.)

  1. From the command prompt, run the following command to report the active MAC address:

net config rdr

If the MAC address is the one you entered in the Registry Editor, the LAA has taken effect.

For more information about using Registry Editor, see Chapter 11, "Registry Editor and Registry Administration," of the Windows NT Resource Guide. For information about specific DLC-related Registry Entries, see Chapter 14, "Registry Value Entries," of the Windows NT Resource Guide.